Segmented coil drum



Jan- 7, 1954 l.. v. ANDERSON ETAL 3,115,891

SEGMENTED COIL DRUM 4 Sheets-Sheet 1 Filed May l2. 196-1 BY BW, 3mm

mm3/(naam Jan. 7, 1964 L. V. ANDERSON ETAL SEGMENTEjD COIL DRUM Filed May l2, 1961 4 Sheets-Sheet 3 SEGMENTED COIL DRUM L. V. ANDERSON ETAL Jan. 7, 1964 Filed May l2, 1961 Jan- 7, 1964 y. ANDERSON ETAL. 3,116,391

SEGMENTED COIL DRUM Filed May 12. 1961 4 eeeee s-sheem United States Patent liice 3,116,891 Patented Jan. 7, ieee 3,116,891 SEGMENTED C011.. DRUM Lyle V. Anderson, Pittsburgh, and Robert Rozenbergs,

deceased, late of Ellwood City, Pa., by Irena Rozenbergs, administratrix, Ellwood City, Ia., assignors to Blew-Knox Company, Pittsburgh, Pa., a corporation of Delaware Filed May 12, 1961, Ser. No. 109,782 Claims. (Si. 242-721) This invention relates to pay-ofi and tension reels for coils of metal strip, and more particularly to reels in which the cross sectional size of the reel-carrying drums may be easily and rapidly changed so that the drums can carry coils having central openings of considerably different diameters.

While the invention may be employed to advantage for various purposes, it provides particular benefits when employed in pay-off and tension or take-up reels in processing lines for strip material such as steel. The processing line may be supplied from a coil of strip mounted on a pay-off reel. In other cases the strip from a processing line may be wound into a coil by a take-up or tension reel. In many cases, the metal is unwound from a coil mounted on a pay-off reel, passed through the processing line, and rewound into a coil mounted on a take-up reel. In both pay-off and take-up reels, it is often necessary to change the drum size in order to accommodate coils having central openings of different diameters. For example, the drums of pay-oit reels often must be changed to accommodate coils having center openings of different sizes, While on take-up reels it is often necessary to Wind coils having different sizes of inner openings.

The present practice is to provide for changes in drum size by making drums with several exterior replaceable drum segments, each of which is radially held on a hub member of the drum by several bolts which extend radially of the drum. The difficulties in the design and construction of the drums are increased by the requirement that the segments be radially movable so as to enable the drum to grip and release a coil. To satisfy the requirements for strength and rigidity, the segments must be quite heavy. Most if not all of the securing bolts pass through the segment surfaces which carry the coil. Usually there are four segments, each held in place by six or more bolts. Therefore, the changing of drum size has been a laborious and time-consuming operation involving the removal of the several bolts from each segment, removal of individual heavy segments, tting the several individual heavy replacement segments, and replacing the bolts. The manual labor required for these operations is costly, but the production loss resulting from interruption of the operation for the lengthy periods required to eifect the change in drum size is even more costly. Furthermore, the bolts holding the segments wear and often jam, adding to the difficulties and time required for replacement of segments. The efforts made to achieve higher processing speeds necessarily involve higher speeds of drum rotation and increased centrifugal forces on the heavy drum segments holding the segments to the hub member. lf bolt failure results from stresses resulting from such forces, substantial safety hazards can result as Well as damage to the material in the coil and to equipment.

An object of the invention is the provision of a reel drum the cross sectional size of which may be changed readily and rapidly, and which is free of these and other disadvantages. A further object is the provision of a reel drum in which the size of the drum can be changed by the removal and replacement of very few bolts and nuts and the removal of a single drum assembly embodying all drum segments and its replacement by another drum assembly embodying drum segments defining a drum of different size. Another object is the provision of a reel drum in which the segments thereof are readily replaceable to change the cross sectional size of the drum, but in which such segments are radially held in place by means other than bolts. Another object is the provision of such a drum having segments which are radially movable in the assembled drum to expand and collapse the drum. The manner of attaining these and other objects of the invention will become apparent from the following description of a preferred form of the invention, reference being made to the accompanying drawings in which:

FIGURE l is a plan View, with parts broken away, of a power driven take-up reel having a drum embodying the present invention;

FIGURE 2 is a side elevation of the apparatus of FIG- URE 1;

FIGURE 3 is a plan to an enlarged scale of the drum portion of the apparatus of FIGURES 1 and 2, the drum being positioned with its strip-gripping slot at the top, and being shown in contracted condition in full lines and expanded condition in broken lines;

FIGURE 4 is an end elevation taken as indicated by line 4-4 of FIGURE 3, the full lines depicting the drum in its contracted condition while the broken lines show it in its expanded condition;

FIGURE 5 is a sectional elevation along line 5-5 of FIGURE 3, the full and broken lines having the same signiiicance;

FIGURE 6 is a longitudinal sectional elevation along line 6 6 of FIGURE 4 showing the parts of the drum structure in the positions they occupy when the drum structure is contracted;

FIGURE 7 is a longitudinal section corresponding generally to FIGURE 6, but showing the relationship of the parts when the drum is expanded;

FIGURE 8 is a cross sectional elevation along line 8-8 of FIGURE 6, but to a larger scale; and

FIGURE 9 is a cross sectional elevation along line 9 9 of FIGURE 7 but to a larger scale.

As shown in FIGURES 1 and 2 the illustrated take-up reel is adapted to coil steel strip emanating from a processing line. The apparatus comprises a drum embodying the invention and generally indicated by reference numeral 1, a transmission unit generally indicated by reference numeral 2, which rotatably supports the drum, and a power source such as a motor 3, which positively rotates the drum as required through transmission unit 2. The transmission unit 2 and motor 3 are rigidly mounted on a frame 4 ixed to oor 5. The drum 1 is adapted to carry a coil 6 shown in broken lines. Suitable coil hoist means, generally indicated by reference numeral 7, is located below the drum 1 in the conventional manner.

The drum 1 is of the cantilever type in that it is supported from one end only and has its other end free. The drum is mounted on and rotates with a shaft 11. One end of the shaft is unsupported and the other end is supported and driven by the transmission unit 2; the shaft can be rotated when desired by motor 3, as described below. An operating rod 12 is mounted coaxially of the shaft. Rod 12 is adapted to be moved axially of shaft 11, by means later described, to expand and collapse the drum 1. The drum is designed so that it can be collapsed to a smaller circumference to enable a coil to be placed on or removed from the drum over its free end, and to be expanded to a larger circumference so that it can firmly engage the inner surface of the coil to prevent relative rotation between the coil andthe drum.

As shown in FIGURES 3 to 9, drum 1 preferably comprises a plurality of segments 13, 14E, 1S and 16 having curved exterior surfaces which define a drum having a generally cylindrical exterior configuration. In the assembled drum, the segment 13 comprises two parts 17 amasar and l'rrigidly connected to each other (see FIGURES 8 andc9). Segment 13 as a whole is both axially and radially immovable relatively to the drum; the segments 14, 15 and 16 are axially immovable but radially movable relatively to the drum as a whole to provide the above mentioned expanded and contracted circumferences of the drum. The assembled drum also includes a clamping bar 19 adapted to be moved radially outwardly toward and inwardly away from cooperating clamping edges 20 of the parts 17 and 18 of segment 13 as segments 14, 15 and 16-move radially outwardly and inwardly. In this manner the end of a strip can be clamped between the bar 19 and one of the cooperating clamping surfaces 20 of the segments 13 when the bar 19 is moved radially outward. Segments 14, 15, and 16 and clamping bar 19, are moved radially from kaxial movement of the operating rod 12 as described later.

In order to make it possible rapidly and readily to change the size ofthe drum, the segments 13 to 16 inclusive, and the clamping bar 19 are included in a subassernbly which may be easily removed and replaced with another subassembly to provide a larger or smaller drum. The structure forY accomplishing this result is shown in FIGURES 6 to 9 inclusive. Adjacent the transmission unit 2, the shaft 11 is provided with a radially extending ange 21. having an outer surface 22 and a radial shoulder Z3'. The shaft has a short cylindrical portion 24, providing a ledge portion which extends forwardly from the shoulder 23 and merges into'a long cylindrical bearing portion 25, of slightly reduced diameter, which extends to the free end of the shaft.

In order to support and operate the segments and clamping bar, a hub member 26 is mounted on the cylindrical bearing portion 25 of shaft 11 so that it is incapable of rotational movement but is capable of axial movement relatively to the shaft. The inner bore of the hub member lits closely on portion 25 of the shaft. The hub member is driven with the shaft by two longitudinally extending keys 27 that are lixed to the hub member and are adapted to slide in a keyway 2.8 formed in and extending longitudinally of shaft 11 from its free end to a point near its supported end. The hub membercan be moved axially of shaft 11 by a spider 29 which is iixed to the front end of the hub member as by bolts 3l) and is clamped between shoulder 31 on rod 12 and locknuts 32 threaded on the end of the rod.

Hub member 26 is provided with inclined wedge por.- tions 33, 34 and 35 arrangedin a plurality of circumferentially spaced longitudinally extending rows. The wedge portions 33, 34 and 35 in each row slidably carry one of the radially movable segments 14, 15 and 16. Hub member 26 also is formed with two longitudinally extending slide members 36 and 37 which deiine a guide portion, parallel to the axis of shaft 11, slidably carrying the radially immovable parts 17 and 18 of segment 13.

Each of the radially movable segments 14, 15 and 16 comprises an outer peripheral portion 38 formed with a curved outer surface constituting part of a cylinder and longitudinal dentate edges having spaced tooth portions 39. The segments 14, 15 and 16 are identical except that the tooth portions 39 of the segment 15 are spaced to tit in between the tooth portions of segments 14 and 16, as shown in FIGURE 3. At its rear end, each segment 14, 15, 16 is formed with a rigid inwardly offset flange or arm portion 49 having a bushed opening 41 (see FIG- URES 3 and 5). Each opening 41 carries a pin 42, the inner end of which closely tits into a recess 43 in the cylindrical portion Z4 of shaft 11, and the outer end of which is rigidly fixed to a clamp member 44 `as by welding.

In order to demountably secure the clamp member to the shaft 11, each clamp member 44 is provided with a groove 45 that tits over the outer periphery 22 of iiange 21 of shaft 11, and is held in place by cap screw 46 threaded into the flange 21. Each clamp member 44 is thus firmly fixed on shaft 11 to resist the substantial forces tending to move the segments axially, by the end of pin 42 in recess 43 and by groove 45 fitting over flange 2.1, as well as by cap screw 46. Each segment 14, 15 and 16 is thus rmly secured against movement longitudinally of the shaft 11, while being permitted to move radially of such shaft since the liange portion 4) is thinner than the space between clamp member 44 and shaft 11.

The inner surface of the peripheral portion 33 of each of these segments is formed with a longitudinal row of inclined wedge portions 47, 43, and 49 that cooperate with the inclined wedge portions 33, 34, and of the corresponding row on hub member 26. Wedge portion 47 near one end of the segment is provided with a longitudinally extending, inclined, undercut T-shaped guide groove 51 which closely iits and is adapted to slide on the corresponding T-shaped inclined wedge portion 33, similarly, an underduct T-shaped guide groove 53 of wedge portion 49 atthe other end of` the segment is closely and slidably tits on the T-shaped portion of wedge 35. The central wedge portion 4S of the segment has an open guide groove 52 adapted to bear against the corresponding inclined central wedge portion 34 of hub member 26.

The inclined surfaces of wedge portions 33, 34 and 35 of the rows on hub member 26, and the mating inclined surfaces of wedge portions 47, 43, and 49 of segments 14, 15, and 16 all have the same angle of inclination, approximately 12 in the illustrated embodiment, and all incline outwardly toward the free or unsupported end of drum assembly 1. The angle and direction of inclination are such that when the hub member 26 is moved toward the unsupported end of the drum assembly 1, the radially movable segments 14, 15, and 16 are drawn radially inwardly toward the axis of the shaft 11 as is shown in FIGURES 6 and 8; whereaswhen hub member 26is moved toward the supported end of the drum assembly, these segments are forced outwardly away from the axis of the shaft 11, as shown in FIGURES 7 and 9. Each of these radially movable segments 14, 15, and 16 is prevented from moving longitudinally of the drum by the radially extending pin 42 fixed on the shaft 11 by one of the clamps 44 as described above. The inclined T-shaped wedge portions 33 and 35 of hub member 26, closely litting in the inclined T-shaped guide grooves 51 and 53 of the wedge portions 47 and 49 of each radially movable segment 14, 15, and 16, thus firmly support the segments on hub member 26.

To form the stationary segment 13, the front ends of the segment parts 17 and 13 are connected to a heavy cross member 54 (see FIGURES 3 and 4), as by bolts 55; member 54 is slotted as at 56 to receive the end of a strip. The rear ends of segment parts 17 and 18 are formed with integral lugs 57 which are fastened to a rear cross member 53, as by bolts 59 (see FIGURES 3, 5, 6. and 7). Cross member 5S has a rearwardly extending iiange portion 61 provided with a bushed opening 62 through which another pin 42 extends. This pin is part of a clamp member 44 demountably secured to shaft 11 by engagement of groove 45 with flange 21, cap screw 46 threaded into flange 21, and a recess 43 in the shaft 11 receiving the inner end of the pin 42, as described above in connection with the clamping members 44 for the other segments. In this case, however, since the segment 13 is not radially movable, the ange portion 61 is thick enough to substantially till the space between the clamping member 42 and the portion 24 of shaft 11, as shown in FIGURES 5, 6, and 7.

The segment 13 is held against movement radially or axially of the drum7 by the parts just described. It is also supported by the axially movable hub member 26. For this purpose, parts 17 and 1S of segment 13 are each formed with a longitudinally extending guideway 65 having an undercut laterally extending groove portion 66, the guideways 65 and groove portions 66 being so formed that in the assembled segment 13 they define a substantially T-shaped slot extending parallel to the axis of shaft 11. This slot makes slidable contact with the parallel slide members 36 and 37 of hub member 26, which dene a guide portion of generally T-shaped outer coniiguration extending parallel to the axis of shaft 11 and hub member 26. These slide members 36 and 37 also define between them a lonfvitudinally extending outwardly opening slot 67 of undercut T-shaped cross section. Slot 67 slidably supports and maires an interlocking connection with a closely titting actuating bar 613 of T-shaped cross section, which bar is thus axially movable but radially immovable relatively to hub member 26. Bar 68 serves to move radially the clamping bar 19, which is slidably located in the slot 69 of segment 13 defined by the longitudinally extending facing surfaces 70 of segment parts 17 and 1S, in such manner that the bar is radially movable but prevented from moving axially of the drum by the end cross members S4 and 5S of segment 13.

To move the clamping bar 19 radially, the upper portion of the actuating bar 68 is provided with several longitudinally inclined wedge portions 71 each having an outwardly extending undercut key-shaped slide portion 72, as shown in FGURES '6 and S. The inner portion of clamping bar 19 is formed with a corresponding number of inclined wedge portions '73 each having an undercut key-shaped guide slot 74 adapted to closely lit and slidably engage the corresponding key-shaped slide portion '72. The wedge portions are inclined outwardly toward the free end of the drum structure so that when the actuating bar 68 moves toward the free end of the drum structure with the hub member 26, it draws the clamping bar 19 radially inwardly; and when the actuating bar 68 moves away from the free end of the drum structure, it forces the bar 19 outwardly. Preferably, the outer longitudinal edge of the clamping bar 19 tapers to a longitudinal ridge as shown in FIGURES 8 and 9, and has closely spaced longitudinally extending serrations 75 which aid in irmly gripping the edge of the strip material against one of the cooperating inclined clamping surfaces 2@ of the xed segment 13.

The actuating bar 68 is moved longitudinally as described above by the operating rod 12. In the illustrated apparatus, a stud 77 threaded into the front end of actuating bar 68 slidably passes through a projecting lug of the spider member 29 fixed to the operating rod 12 and hub member 26. The end of the stud 77 projecting from member 29 has an adjustable stop nut 78; a compression spring 79 also surrounds the stud 7'7 between the facing surfaces of the actuating bar 6g and the spider 29. Therefore, when the operating rod 12 moves the hub member 26 toward the free end of the drum, the actuating bar 68 is positively drawn in the same direction with such members by stud 77, and the clamping bar is positively moved radially inwardly of the drum. However, when the operating rod 12 and hub member- 26 are moved axially away from the free end of the drum, the actuating bar 68 is resiliently moved in the same direction through the compression sprinU 79, thus causing the clamping bar 19 to be resiliently forced outwardly in clamping relation; this resiliency facilitates gripping of the inner edge of the coil strip material between one of the clamping surfaces of the bar 19 and one of the surfaces 29 of segment 13.

In operation of the illustrated drum, movement of the operating rod 12 toward the free end or" the drum to its extreme position illustrated in FIGURE 6 causes the spider member 29 fixed to the end of the rod 12 to move the hub member 26 simultaneously with the rod. Such movement of the hub member 26 causes the wedge portions 33, 34, and 35 of the hub member 26 to slide relatively to the wedge portions 47, 4S, and 49 of the radially movable segments 1d, 15, and 16, causing these segments to be drawn radially inwardly by the cooperating interloclced wedge portions 33 and 47, and 3S and 49; these segments 14, 1S, and 16 are prevented from movement axially or longitudinally of the drum by the pins 42 of clamping members 44 rigidly secured to the shaft 11. The actuating bar 68 is moved simultaneously with hub member 26 by the stud 77 which is in tension; this longitudinal movement of the actuating bar 68 relatively to the clamping bar 19 causes the clamping bar to be drawn inwardly toward the axis of the drum structure. The drum structure now has its smallest external circumference and the clamping bar 19 is located at its innermost position, as shown in FIGURES 6 and 8, so that the drum structure is ready to have the end of a length of strip material positioned in the slot 69 between the clamping bar 19 and a clamping surface 20 of segment 13.

When the operating rod 12 is moved axially within shaft 11 away from the free end of the drum toward its supported end, the spider member 29 and hub portion 26 move simultaneously with rod 12. Such axial movement of the hub portion 26 causes the inclined surfaces of the wedge portions 33, 34 and 35 of the hub member 26 to slide relatively to the inclined surfaces of wedge portions 47, 4S, and 49 of the segments 14, 15, and 16, thus forcing the segments radially outwardly. Pressure of the spider member 29 against the spring 79, and pressure of the spring 79 against the end of actuating bar 68 causes the bar to move axially relatively to the hub member 26, thus causing the bar to be forced radially outwardly so that its outer edge resiliently clamps the end of the strip against an edge 2t) of segment 13. FIGURES 7 and 9 show the relative positions of the parts when the operating rod 12 is moved to its extreme position relatively to the supported end of the drum structure. When in this condition, the drum has its maximum circumference and the clamping bar 19 is located in its extreme outward position, so that the drum can firmly support and grip a coil.

Preferably, the drum is supported in such manner so that it can be rotated in either direction when desired, and so that the operating rod 12 can be axially moved in either direction to expand or collapse the drum while it is stationary or while it is being rotated. The shaft 11, which is rotatably supported and secured against axial movement by transmission unit 2, is positively rotated when desired by a gear S1, Iixed to the shaft, meshing with a pinion 82 fixed to a shaft 83 driven by the motor 3.

The operating rod 12 has a rear portion extending from the rear end of shaft 11. This projecting end of rod 12 is connected to means, generally indicated by reference character 84, which rotatably supports the end of the rod while moving it axially as required. This means comprises a housing 85 rigidly xed to the transmission unit 2 and containing a saddle member 86 slidably but non-rotatably mounted in housing 85. The end of rod 12 is supported in saddle member 86 by a bearing 87 and is adapted to be moved axially through a thrust bearing 38, one race of which is connected to the end of the rod 12 and the other race of which is supported in the saddle member 86. The saddle member 86 is moved axially as required by the piston rod 89 actuated by the piston 91 of a hydraulic cylinder 92. The hydraulic cylinder is connected through conduits 93 and 94 to a. suitable source of hydraulic fluid under pressure.

The illustrated apparatus also includes a stripper plate 9S for pushing the coil 6 oi the drum 1 when the drum is in its contracted or collapsed condition. This stripper plate is xed to two bars 96 slid-ably mounted in guides 97 iixed to transmission unit 2, and is moved axially of drum -1 as required by two hydraulic cylinders 98 fixed to unit 2 and havin-g piston rods 99 connected to the stripper plate. When a coil is stripped from the drum, the end ofthe strip that was clamped by bar l19 passes through the slot 56 in cross member 54.

The size of the drum 1 can be readily changed Within wide limits to accommodate coils having different size inner openings. This can be accomplished merely by removing the four cap screws 46 and the four clamping members 44 With their aixed pins 42, removing locknuts 32 from the outer end of operating rod 12, and removing from the main shaft ll the entire drum assembly comprising hub member 26, and segments i3, i4, 15, and lo and lassociated parts mounted on such hub member. A replacement drum assembly of different cross sectional size but of corresponding parts -then may be easily installed on the projecting shaft ll by sliding it over the free end of shaft 11 with its keys Z7 in keyway 28 of the shaft, mounting four clamping members 44- in place with their pins 42 extending-through the hushed openings 4l of segments 13, d4, 1S, and 15 into the recesses 43 in the shaft and with their grooves 45 fitting over the radially extending ange 2,1 of the shaft 1l, threading the four cap screws 4,6 into place to hold the clamping member securely, and then threading'fthe locknuts 32 on the end of operating rod 12.

The operation just described requires much less time to change drum sizes than is required by conventional practices involving bolting on of segments of different sizes. Substantial savings in labor costs are effected in the operation of changing the drum; and even greater savings result from the reduction in loss of production. Furthermore, the design is such that the clamping members, bolts and nuts are always readily removable since they are not subjected to impact or to contact within the coil so that prior difliculties arising from jamming of bolts or nuts -are avoided. Moreover, the simple and rugged construction of the parts, and the firm holding of the segments in place on lthe hub member by slides and guideways of interlocking cross section provide the rigidity and strength required to support the coil, and make possible safety in operation even at hi-gh rotational speeds.

Those skilled in the art will appreciate that various changes and modiiications can be made in 4the 'illustrated embodiment of the invention without departing from the spirit and scope thereof, and that the invention may be employed for purposes Vother than that in connection with which it was specifically discussed. The essential characteristics of the invention are delined in the appended claims.

We claim:

l. An expandable drum for coiling strip material comprising a supporting and `driving sha-ft rotatably supported from one end about an axis and having an unobstructed Ifree end, said shaft having near its supported end a generally `axially extending segment connecting portion;

a drum assembly demountably supported on said shaft and comprising a hub member mounted on said shaft to move non-rotatably but axially relatively to said shaft, and to be axially moved on or olf said shaft over its free end after the drum assembly is disconnected from said shaft, and

a plurality of elongated drum segments circumferentially arranged around and supported by said hub member for rotation therewith, at least some of said segments being movable on said hub member radially toward and away from said shaft upon movement of said hub member axially of said shaft, each of said radially movable segments having at its end near the supported end of said shaft an opening radially extending therethrough;

clamp means demountably xed on said connecting portion of said shaft and rigidly carrying a pin extending through and slida-bly engaging the opening of each radially movable segment, whereby each of said radially `movable segments is permitted to move radially relatively to said shaft but is prevented from moving longitudinally of said shaft when said hub member moves axially thereof; and

Imeans for moving said hub member axially of said shaft, said means being demountably connected to said hub member at the free end of said shaft.

2. An expandable drum for coiling strip material comprising a supporting and driving shaft rotatably supported from one end about an axis and having an unobstructed free end, said shaft having near its supported end means providing a generally axially extending segrent connecting portion, said shaft having a plurality of openings extending radially inwardly of said shaft `from said connecting portion;

a drum assembly demonntably supported on said shaft and comprising a hub member which is mounted on said shaft so `that it can (move non-rotatably but axially relatively to said shaft and be axially moved on or ofi said shaft over its free end after the drum assembly is disconnected from said shaft, and

a plurality of elongated drum segments circumferentially arranged around and supported by hub member for rotation therewith, at least some of said segments being movable on said hub member radially' toward and away from said shaft upon movement of said hu-b member axially of said shaft, each of said radially movable segments having a-t its end near the supported end of said shaft a radially extending opening therethrough which is in alignment with one of said radial openings in said shaft;

clamp means demountably iixed on said flange means of said shaft and rigidly carrying a pin which extends through and makes sliding engagement with said opening of each radially movable segment and which is seated in one of said radial openings in said shaft, whereby each of said radially movable segments is permitted to move radially relatively to said shaft but is prevented from moving longitudinally of said shaft when said hub member moves axially thereof; and

means for moving said hub member axially of said shaft, said means being demountably connected to said hub member at the free end of said shaft.

3. An expandable drum for coiling strip material comprising a supporting and driving shaft rotatably supported from one end about an axis and having an unobstructed free end, said shaft having near its supported end means providing a generally axially extending segment connecting portion;

a drum assembly demountably supported on said shaft and comprising a hub member which is mounted on said shaft so that it can move non-rotatably but axially relatively to said shaft and be axially moved on or off said shaft over its free end after the drum assembly is disconnected from said shaft, and

a plurality of elongated vdrum segments circumferentially arranged around and supported by said hub member for rotation therewith, atleast some of said segments being movable on said hub member radially toward and away from said shaft upon movement of vsaid hub member axially of said shaft, each of said radially movable segments having an outer coil supporting surface the portion of which adjacent said connecting portion of said shaft is at all times a greater distance from said `shaft axis 'than said connecting portion, each of said segments having at its end near the supported end of said shaft an arm portion extending over said connecting portion and located substantially closer to said shaft than Ithe outer coil supporting surface portion of said segment adjacent said connecting portion,

9 said arm portion having an opening radially extending therethrough; clamp means demountably fixed on said yconnecting portion of said shaft and rigidly carrying a pin which seated in one of the radial openings in said shaft, said -pin passing through and slidably engaging the opening lthrough the arm portion of one of said radially movable segments, and

extends throfugh said opening in each segment and demountable radially extending means rigidly conmakes sliding engagement with said `opening of each neicting said longitudinally extending clamp porradially movable segment, whereby each of said segtion to said flange portion of said shaft, all porments is permitted to m'ove radially relatively to said tions of said clamp members being closer to 'shaft but is prevented from moving longitudinally of said shaft axis than said outer coil supporting said shaft when said hub member moves axially 10 surface portion of the associated segment; thereof, all portions of said clamp means being closer and demountable means located at and accessible from to said shaft axis than said outer coil supporting surthe free end yo-f said shaft for connecting said hub face portion of the adjacent segment; member to said operating rod. and means for moving said hub member axially of said 5. An expandable drum for coiling strip material comshaft, lsaid means being demountably connected to prising said hub member at the free end of said shaft. a supporting and driving shaft which is rotatably sup- 4. An expandable drum for coilinfg strip materid compor-ted from one end about an `axis and has an unprising obstructed free end, said shaft having near its supa supporting and `driving shaft rotatably supported from ported end a generally axially extending segment conone end about an axis and having an unobstructed necting portion; free end, said shaft having fixed near its supported a drum lassembly demountably supported on Said shaft end generally transversely extending radially projectand comprising ing flange means with a generally axially extending a hub member mounted yon said shaft to move nonouter edge and a ledge portion adjacent said flange rotatably but axially relatively to said shaft, and means extending generally axially ytoward the free to be axially moved ion or off said shaft over its end of 'said shaft, said shaft having a plurality of free end after the drum assembly is disconnected openings extending radially inwardly of said shaft from said shaft, and from said ledge portion; a plurality of elongated drum segments circumferan operating rod mounted in said shaft for axial moveentially arranged yaround and supported by said ment toward and away from the free end of said hub member for rotation therewith, atleast some shaft, said rod projecting from the .free end of said of said segllenS being movable 0n Said nnb shaft; member radially toward and away from said a drum assembly supported on said shaft and com- Shaft upon movement of said hub member axially prising of said shaft, said segments having outer coil a hub member mounted on said shaft to move noncarrying Surfaces which if projected toward the rotatably but axially relatively to said shaft and SnPlJOred 6nd 0f Said Shaft define a generally to be axially moved on Ior off said shaft over its K 'Cylindrical PYOleCiCd Surface, each O Snid radifree end after vthe drum assembly is disconnected ally IHOVablG SSgmGntS having at its end near from said shaft, and the supported end of said shaft radially extenda plurality @if elongated drinn Segments ilcutn'lfer.. 40 ing Slide means lOCatCd Wholly Said gen* entially arranged around and supported by said ei'lly Cylindrical Sin'fa; hub member, `@it least 5eme 0f Said Segments be. holding means demountably fixed to said connecting ing movable on Said l-mb member radially toward portion of said shaft and located wholly within said and away from said shaft upon movement of generally ylindi'lcal PFOeOed Surface, Said holding said hub member axially 0f said Sham, each ef 45 means lhaving radially extending slide means for ensaid radially movable segments having an outer gnging Said Slide means 0n each Of Said radially inOV coil supporting surface the portion 0f which able segments and permitting each of said radially adjacent said ange means on said shaft is at InOVablC Segments t0 TnOVe 1'adinlly but ndi longiall times a greater distance from Said Shaft axis itudinally relatively to said shaft, 4all parts of said holdthan Said ilaiige means, each of Said Segments ing means being radially removable from said shaft; having at its end adjacent said flange means an and am portion extending over Said ledge portion means for moving said hub member axially of said shaft, 0f Said Shaft and being substantially 0105er to said means being demountably connected to said hub said shaft than the outer coil supporting surface lneinben of said segment, said arm portion having therethrough a radially extending Opening which is in References Cited 1n the file of tlns patent aliginnhllflt with one `of said radial openings in UNITED STATES PATENTS sar s t; j a plurality of clamp members, one for each of said seg- Ilch "af'l ments, each C13-nlp member Comprising f .i ay 27, 1952 a portion extending longitudinally of sa1d shaft 2 630 278 Herman Mal. 3 1953 and having a groove engages the edge Of Perrin-e -Iune Said flange means on said shaft a in ed to Said rt. d h 1 d 2,971,765 Atherholt Feb. 14, 1961 P P0 lo an avmg a 0W en 2,989,263 Smeets June 20, 196i 

1. AN EXPANDABLE DRUM FOR COILING STRIP MATERIAL COMPRISING A SUPPORTING AND DRIVING SHAFT ROTATABLY SUPPORTED FROM ONE END ABOUT AN AXIS AND HAVING AN UNOBSTRUCTED FREE END, SAID SHAFT HAVING NEAR ITS SUPPORTED END A GENERALLY AXIALLY EXTENDING SEGMENT CONNECTING PORTION; A DRUM ASSEMBLY DEMOUNTABLY SUPPORTED ON SAID SHAFT AND COMPRISING A HUB MEMBER MOUNTED ON SAID SHAFT TO MOVE NON-ROTATABLY BUT AXIALLY RELATIVELY TO SAID SHAFT, AND TO BE AXIALLY MOVED ON OR OFF SAID SHAFT OVER ITS FREE END AFTER THE DRUM ASSEMBLY IS DISCONNECTED FROM SAID SHAFT, AND A PLURALITY OF ELONGATED DRUM SEGMENT CIRCUMFERENTIALLY ARRANGED AROUND AND SUPPORTED BY SAID HUB MEMBER FOR ROTATION THEREWITH, AT LEAST SOME OF SAID SEGMENTS BEING MOVABLE ON SAID HUB MEMBER RADIALLY TOWARD AND AWAY FROM SAID SHAFT UPON MOVEMENT OF SAID HUB MEMBER AXIALLY OF SAID SHAFT, EACH OF SAID RADIALLY MOVABLE SEGMENTS HAVING AT ITS END NEAR THE SUPPORTED END OF SAID SHAFT AN OPENING RADIALLY EXTENDING THERETHROUGH; CLAMP MEANS DEMOUNTABLY FIXED ON SAID CONNECTING PORTION OF SAID SHAFT AND RIGIDLY CARRYING A PIN EXTENDING THROUGH AND SLIDABLY ENGAGING THE OPENING OF EACH RADIALLY MOVABLE SEGMENT, WHEREBY EACH OF SAID RADIALLY MOVABLE SEGMENTS IS PERMITTED TO MOVE RADIALLY RELATIVELY TO SAID SHAFT BUT IS PREVENTED FROM MOVING LONGITUDINALLY OF SAID SHAFT WHEN SAID HUB MEMBER MOVES AXIALLY THEREOF; AND MEANS FOR MOVING SAID HUB MEMBER AXIALLY OF SAID SHAFT, SAID MEANS BEING DEMOUNTABLY CONNECTED TO SAID HUB MEMBER AT THE FREE END OF SAID SHAFT. 